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  <title>Document</title>
  <style>
    .div{
      width: 0;
      height: 0;
      border: 5px solid ;
      border-color: transparent red transparent transparent;
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    .cal {
      /* white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis; */
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
}
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</head>
<body>
  <div class="div"></div>
  <div class="cal">8888888888888888888888888888888888</div>
</body>
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